In the header:
static const int myArray[3][3];
In the source file:
const int MYCLASS::myArray[3][3] = { {1,2,3},{1,2,3},{1,2,3} };
In the header:
static const int myArray[3][3];
In the source file:
const int MYCLASS::myArray[3][3] = { {1,2,3},{1,2,3},{1,2,3} };